When to Use the useEffect Hook?
- Fetching Data: When you need to fetch data from an API or a server when the component mounts or when certain state variables change.
- Subscriptions and Event Listeners: When you need to subscribe to events, such as keyboard events, window resizing, or WebSocket messages.
- Manual DOM Manipulation: When you need to perform manual DOM manipulations, like changing the title of the page or adding/removing classes.
- Clean-up Operations: When you need to perform clean-up operations, like unsubscribing from event listeners or canceling asynchronous tasks when the component unmounts or when certain dependencies change.